1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdio.h>
3 
4 #include "cpu.h"
5 #include "fs/fs.h"
6 
cpu__get_max_freq(unsigned long long * freq)7 int cpu__get_max_freq(unsigned long long *freq)
8 {
9 	char entry[PATH_MAX];
10 	int cpu;
11 
12 	if (sysfs__read_int("devices/system/cpu/online", &cpu) < 0)
13 		return -1;
14 
15 	snprintf(entry, sizeof(entry),
16 		 "devices/system/cpu/cpu%d/cpufreq/cpuinfo_max_freq", cpu);
17 
18 	return sysfs__read_ull(entry, freq);
19 }
20